Tank car residual liquid centralized collection system

Abstract

The utility model discloses a tank truck residual liquid centralized collection system, which comprises a pre-buried pool, a gas injection pipe and a water injection pipe, the composite hose is used for communicating with the bottom of the tank car tank body; the input end of the liquid conveying pump is communicated with the pre-buried pool, the output end of the liquid conveying pump is communicated with the storage container, a liquid discharging pipe is arranged at the bottom of the storage container, and the liquid discharging pipe is connected with a liquid discharging valve. According to the tanker residual liquid centralized collection system, the composite hose is connected with the bottom of the tank tanker, residual liquid in the tank can be conveniently pumped into the collection container through the liquid conveying pump after being introduced into the pre-buried pool, the residual liquid collection efficiency is improved, the burden of workers is relieved, clear water and nitrogen can be supplemented into the pre-buried pool through the water injection pipe and the gas injection pipe, and the detection device is matched, so that the detection efficiency is improved. Certain water level and oxygen content are maintained in the pre-buried pool, so that safe use of the pre-buried pool is guaranteed, and the safety risk when workers clean the tank car is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of hazardous chemical storage and transportation equipment, and in particular to a centralized collection system for residual liquid from tank trucks. Background Technology

[0002] In port operations, tank trucks are typically used to temporarily store and transport various liquid hazardous chemicals. Due to the wide variety of hazardous chemicals in port operations (including petroleum and its derivatives, alcohols, acids, alkalis, and various organic chemicals), tank trucks usually need to be cleaned regularly or temporarily in order to ensure the quality of product transportation, prevent safety accidents, and protect tank truck equipment.

[0003] During the cleaning of tank truck bodies, manual operation is usually adopted. Because there are a lot of chemical residues inside the tank, and these residues are quite harmful to the surrounding environment and the health of workers, employees need to wear respirators to collect the residues inside the tank and then pour the collected residues into a ton container. This is not only inefficient and increases the burden on workers, but also the residue collection efficiency is low. Even if some of the residues inside the tank can be cleaned, the exhaust gas generated by the evaporation of the residues cannot be collected. As a result, when workers clean the tank after collecting some residues and pouring them into the ton container, they are still affected by the residues inside the tank and the exhaust gas.

[0004] Therefore, there is an urgent need for a centralized collection and treatment system for residual liquid from tank trucks. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the existing technology and provide a centralized collection system for tank truck residual liquid that reduces the burden on workers, improves manual efficiency, reduces safety risks, and is energy-saving and environmentally friendly.

[0006] To achieve the above-mentioned technical effects, the technical solution of this utility model is: a centralized collection system for residual liquid from tank trucks, comprising:

[0007] The pre-buried pool is enclosed at the top and located below the ground. It is equipped with a detection device for detecting liquid level, oxygen content and pressure. The pre-buried pool is fixedly connected to an injection pipe for injecting nitrogen and a water injection pipe for injecting clean water, respectively. The injection pipe and the water injection pipe are respectively connected to an injection valve and a water injection valve.

[0008] The composite hose has an inlet end for communicating with the bottom of the tanker truck body and an outlet end for communicating with the pre-buried pool, with the inlet end located above the outlet end.

[0009] An infusion pump and a storage container are provided. The infusion pump is connected to the pre-buried pool at its input end and to the storage container at its output end. A drain pipe is provided at the bottom of the storage container and a drain valve is connected to the drain pipe.

[0010] Preferably, in order to reduce the power consumption of the infusion pump, the infusion pump is connected to a suction tube at its input end. The suction tube is a telescopic tube with adjustable axial length. The top end of the telescopic tube is connected to the infusion pump, and the bottom end is connected to a float.

[0011] Preferably, in order to facilitate the adjustment of the axial length of the liquid extraction tube according to the liquid level, the liquid extraction tube is a corrugated flexible tube.

[0012] Preferably, in order to ensure the stable lifting and lowering movement of the liquid extraction pipe, the float slides vertically within the pre-embedded pool.

[0013] Preferably, in order to remove exhaust gas from the tanker and reduce health hazards to workers during tanker cleaning, a conveying assembly is provided between the composite hose and the pre-embedded pool. The conveying assembly is used to transport fluid from the tanker to the pre-embedded pool. The fluid in the tanker includes residual liquid and exhaust gas.

[0014] Preferably, in order to realize the fluid transportation inside the tank of the tank truck, the transportation assembly includes a cylinder, a piston and a drive unit. The circumferential outer edge of the piston is sealed to the circumferential inner wall of the cylinder. The drive unit drives the piston to reciprocate along an axial direction parallel to the cylinder. The cylinder and / or the piston are provided with an inlet and an outlet. The inlet and the outlet are respectively connected to an input check valve and an output check valve.

[0015] Preferably, in order to improve fluid transport efficiency, the cylinder is axially vertical and open at the top, the outlet is located at the bottom of the cylinder, and the inlet is located above the outlet.

[0016] Preferably, in order to achieve stable fluid delivery, the piston is provided with a liquid inlet channel, the inlet being one end of the liquid inlet channel connected to the composite hose, and the input check valve is located inside the liquid inlet channel.

[0017] Preferably, in order to ensure the cleanliness of the inside of the cylinder, a filter screen is provided on the top of the cylinder, and the piston seal passes through the filter screen.

[0018] Preferably, in order to drive the reciprocating movement of the piston, the drive unit includes a drive motor, a drive link, and a transmission link. The drive motor is fixedly connected to the pre-embedded pool and its output end is hinged to one end of the drive link. The other end of the drive link is hinged to the piston through the transmission link.

[0019] In summary, compared with existing technologies, this utility model's centralized collection system for tank truck residual liquid uses a composite hose connected to the bottom of the tank truck to facilitate the introduction of residual liquid from the tank into a pre-buried pool. The residual liquid is then pumped into a collection container using a pump, improving collection efficiency and reducing worker workload. Water and nitrogen can be added to the pre-buried pool via water and air injection pipes, respectively. Combined with a detection device, this ensures a certain water level and oxygen content within the pre-buried pool, guaranteeing its safe use and reducing safety risks for workers cleaning tank trucks. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the first embodiment;

[0021] Figure 2 yes Figure 1 An explosion diagram;

[0022] Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure;

[0023] Figure 4 This is a structural schematic diagram of the second embodiment;

[0024] Figure 5 yes Figure 4 A schematic diagram of the cross-sectional structure;

[0025] Figure 6 yes Figure 5 Enlarged view of part A;

[0026] In the diagram: 1. Pre-buried pool; 11. Pool body; 12. Pool cover; 13. Air injection pipe; 131. Air injection valve; 14. Water injection pipe; 141. Water injection valve; 2. Detection device; 21. Display; 22. Liquid level sensor; 23. Pressure sensor; 24. Oxygen concentration meter; 3. Composite hose; 31. Liquid inlet; 32. Liquid outlet; 4. Infusion pump; 41. Input pipe; 42. Output pipe; 5. Storage container; 5 1. Drain pipe; 52. Drain valve; 6. Suction pipe; 61. Float; 62. Guide rod; 7. Conveying assembly; 71. Cylinder; 711. Outlet; 712. Output check valve; 72. Piston; 721. Inlet channel; 722. Inlet; 723. Input check valve; 73. Drive unit; 731. Drive motor; 732. Drive linkage; 733. Transmission linkage; 734. Motor frame; 74. Filter screen. Detailed Implementation

[0027] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0028] First Embodiment

[0029] like Figures 1-3 As shown, a tanker truck residual liquid centralized collection system according to the first embodiment of this utility model includes:

[0030] The pre-buried pool 1 is closed at the top and located below the ground. It is equipped with a detection device 2 for detecting liquid level, oxygen content and pressure. The pre-buried pool 1 is fixedly connected to an injection pipe 13 for injecting nitrogen and a water injection pipe 14 for injecting clean water. The injection pipe 13 and the water injection pipe 14 are respectively connected to an injection valve 131 and a water injection valve 141.

[0031] The composite hose 3 has an inlet end 31 and an outlet end 32 at its two ends. The inlet end 31 is located above the outlet end 32. The inlet end 31 is used to connect with the bottom of the tanker body, and the outlet end 32 is connected with the pre-buried pool 1.

[0032] The infusion pump 4 and the storage container 5 are provided. The input end of the infusion pump 4 is connected to the pre-buried pool 1, and the output end is connected to the storage container 5. The bottom of the storage container 5 is provided with a drain pipe 51, and the drain pipe 51 is connected to a drain valve 52.

[0033] In this system, the pre-buried pool 1 is buried underground, while the tanker truck carrying hazardous chemicals moves on the ground, making the height of the tanker truck higher than the height of the pre-buried pool 1. When using the collection system of this embodiment, the tanker truck moves to the vicinity of the pre-buried pool 1, and then the liquid inlet 31 of the composite hose 3 is connected to the bottom of the tanker truck. A valve is provided at the connection between the bottom of the tanker truck and the liquid inlet 31. After the liquid inlet 31 is connected to the bottom of the tanker truck, the valve is opened, allowing the residual liquid in the tank to flow from top to bottom into the pre-buried pool 1 along the composite hose 3, thereby reducing the amount of chemical residue in the tanker truck. The residual liquid is automatically collected by gravity. Compared with the prior art of manually collecting residual liquid while wearing a respirator, the operation is more convenient, reducing the burden on workers, improving the efficiency of residual liquid collection, and reducing the health hazards to workers. Similarly, since the residual liquid in the tank is reduced, the cleaning burden on workers in the later stage can also be reduced, the amount of cleaning water used can be reduced, equipment wear and tear and pollution to the surrounding environment can be reduced, and the health hazards to cleaning workers can also be reduced.

[0034] After the residual liquid in the tank enters the pre-buried pool 1, the infusion pump 4 is turned on. The infusion pump 4 collects the residual liquid in the pre-buried pool 1 into the storage container 5. In this embodiment, the storage container 5 is a ton drum. By collecting the residual liquid into the ton drum, it is convenient to reserve space for the pre-buried pool 1 so that the residual liquid in the tank of the tank truck can be introduced later. When the amount of residual liquid collected in the ton drum reaches a certain capacity or the ton drum has been used for a period of time, the drain valve 52 is opened to facilitate the discharge of the residual liquid in the ton drum from the system.

[0035] In this embodiment, the pre-embedded pool 1 includes a barrel-shaped pool body 11 and a pool cover 12 that is sealed and fixedly installed on the top of the pool body 11. The top of the pool cover 12 is integrally formed with an air injection pipe 13 and a water injection pipe 14 that communicate with the inner cavity of the pool body 11 and extend upward. The air injection pipe 13 is used to connect to a nitrogen source, so that the nitrogen source can introduce nitrogen into the pool body 11 through the air injection pipe 13. The water injection pipe 14 is used to connect to a clean water source, so that the clean water source can inject clean water into the pool body 11 through the water injection pipe 14.

[0036] By injecting clean water into the pool 11, the water level in the pool 11 can be adjusted, the residual liquid can be diluted, and the accumulation of excessively concentrated residual liquid in the pool 11 can be prevented from causing corrosion and damage to the structure of the pool 11. By introducing nitrogen into the pool 11, the oxygen content in the pool 11 can be reduced. First, the water injection valve 141 is opened to inject clean water into the pool 11 to dilute the residual liquid. Then, the water injection valve 141 is closed, and the air injection valve 131 is opened to inject nitrogen into the pool 11 through the air injection pipe 13 to replace the inside of the pool 11. At the same time, the infusion pump 4 is turned on so that a large amount of diluted residual liquid can be introduced into the ton container through the infusion pump 4 to ensure that the liquid level in the pool 11 is reduced and the oxygen content is reduced, so as to ensure the safe and long-term use of the pre-buried pool 1.

[0037] In this embodiment, the detection device 2 includes a display 21 fixed above the pool cover 12, and a liquid level sensor 22, a pressure sensor 23, and an oxygen content meter 24, all fixed below the pool cover 12 and located inside the pool body 11, to detect the liquid level, air pressure, and oxygen content inside the pool body 11 respectively. The display 21 is used to display the above data in the pre-buried pool 1 to ensure the safe use of the pre-buried pool 1.

[0038] In addition, to ensure the safe use of the composite hose 3, the composite hose 3 in this embodiment is preferably a PTFE composite hose 3 or a PSP corrosion-resistant composite hose 3.

[0039] The inner layer of the PTFE composite hose 3 is made of polytetrafluoroethylene, which has excellent chemical stability, corrosion resistance, high and low temperature resistance, and non-stick surface, and can resist the erosion of a variety of strong corrosive chemicals. The middle reinforcing layer is composed of high-strength fiber braided mesh and spiral steel wire mesh, which can improve the strength and pressure resistance of the hose. The outer layer is made of silicone or rubber, which provides additional protection and specific properties, such as wear resistance and weather resistance.

[0040] The PSP corrosion-resistant composite hose 3 is composed of multiple materials and a multi-layer sealing structure. The inner layer material is a polypropylene film, which has good anti-rupture and anti-leakage properties and will not burst suddenly. It can easily handle the transmission of gasoline, diesel, crude oil and various chemical liquids, and has high flexibility. In addition, it is lightweight, tough, easy to handle, flexible in use, resistant to high and low temperatures, anti-aging and corrosion.

[0041] The infusion pump 4 is preferably a diaphragm pump, with its input end fixedly connected to an input pipe 41. The input pipe 41 is fixedly and sealed through the pool cover 12 and extends downward to have a gap with the inner bottom wall of the pool body 11. The output end is fixedly connected to the top of the ton container through an output pipe 42.

[0042] The infusion pump 4 is a diaphragm pump, which has the advantages of strong media adaptability, good sealing performance, strong self-priming ability, stable pressure, and simple operation and maintenance.

[0043] Second Embodiment

[0044] like Figures 4-6 As shown, the second embodiment of the present invention provides a tank truck residual liquid collection system based on the first embodiment. The difference is that the input end of the infusion pump 4 is connected to a suction pipe 6, which is a telescopic pipe with adjustable axial length. The top end of the telescopic pipe is connected to the infusion pump 4, and the bottom end is connected to a float 61.

[0045] Specifically, the top of the input pipe 41 is connected to the input end of the infusion pump 4, and the bottom end is fixedly sealed through the pool cover 12. It is connected to the bottom end of the suction pipe 6 through the float 61. The float 61 can be suspended on the surface of the residual liquid in the pool body 11, so that the bottom of the suction pipe 6 can be close to the bottom of the residual liquid. Compared with the first embodiment, when the infusion pump 4 is transporting residual liquid, each time it draws residual liquid, it is the solution close to the top of the liquid surface. This reduces the work that the residual liquid needs to do to overcome its own gravity and flow upward into the storage container 5, thereby reducing the power consumption of the infusion pump 4 in transporting residual liquid and achieving energy saving and environmental protection.

[0046] A further improvement is that the suction pipe 6 is a corrugated hose; the float 61 slides vertically within the pre-buried pool 1. Specifically, the corrugated hose is fixedly inserted through the float 61, and guide rods 62 extending vertically are provided at the four corners of the float 61. The two ends of the guide rods 62 are fixedly connected to the inner bottom wall of the pool cover 12 and the pool body 11, respectively, and the float 61 is slidably sleeved on the outside of the guide rods 62.

[0047] With the above structure, when the liquid level in the pool 11 changes, the float 61 moves stably up and down in the vertical direction, thereby ensuring that the liquid extraction pipe 6 undergoes stable deformation in the axial direction and avoiding the liquid extraction pipe 6 from shifting in the horizontal direction, which would affect the detection of the detection device 2.

[0048] A further improvement is that a conveying assembly 7 is provided between the composite hose 3 and the pre-buried pool 1. The conveying assembly 7 is used to convey the fluid in the tanker tank to the pre-buried pool 1. The fluid in the tanker tank includes residual liquid and exhaust gas.

[0049] By setting up the conveying component 7, not only can the output of residual liquid in the tank of the tank truck be accelerated and the efficiency of residual liquid collection be improved, but also the exhaust gas in the tank can be extracted after the residual liquid is output, reducing the health hazards to cleaning workers when cleaning the tank.

[0050] A further improvement is that the conveying assembly 7 includes a cylinder 71, a piston 72, and a drive unit 73. The circumferential outer edge of the piston 72 is sealed to the circumferential inner wall of the cylinder 71. The drive unit 73 drives the piston 72 to reciprocate along an axial direction parallel to the cylinder 71. The cylinder 71 and / or the piston 72 are provided with an inlet 722 and an outlet 711. The inlet 722 and the outlet 711 are respectively connected to an input check valve 723 and an output check valve 712.

[0051] When the conveying assembly 7 is running, the piston 72 is driven by the drive unit 73 to move back and forth along the cylinder 71 axially, compressing the internal space of the cylinder 71. The flow direction of the fluid is limited by the input check valve 723 and the output check valve 712, so that the residual liquid and exhaust gas in the tank enter the cylinder 71 with the internal space expanded through the composite hose 3 and the inlet 722 along a fixed path. As the internal space of the cylinder 71 is compressed, the introduced fluid is discharged from the cylinder 71 through the outlet 711 and enters the interior of the pool 11.

[0052] A further improvement is that the cylinder 71 is axially vertical and open at the top, with the outlet 711 located at the bottom of the cylinder 71 and the inlet 722 located above the outlet 711; the piston 72 is provided with a liquid inlet channel 721, the inlet 722 being one end of the liquid inlet channel 721 connected to the composite hose 3, and an input one-way valve 723 is located inside the liquid inlet channel 721; the drive unit 73 includes a drive motor 731, a drive connecting rod 732, and a transmission connecting rod 733, the drive motor 731 is fixedly connected to the pre-embedded pool 1 and its output end is hinged to one end of the drive connecting rod 732, and the other end of the drive connecting rod 732 is hinged to the piston 72 through the transmission connecting rod 733.

[0053] Specifically, a connecting port is fixed on the pool cover 12, an inlet 722 is fixedly connected to the top of the connecting port, a cylinder 71 is fixed vertically upwards to the top of the pool cover 12, and a drive motor 731 is fixed above the pool cover 12 via a motor bracket 734. With the above structure, the drive motor 731 starts, driving the drive linkage 732 to rotate around the output shaft centerline of the drive motor 731. At the same time, the drive linkage 733 acts on the piston 72, allowing the piston 72 to move up and down reciprocally inside the cylinder 71 along the vertical direction. When the cylinder 71 moves upward, the space formed by the inner wall of the cylinder 71 and the piston 72 increases, facilitating the fluid in the tank to enter the space formed by the cylinder 71 and the piston 72 through the input one-way valve 723. When the cylinder 71 moves downward, the space formed by the inner wall of the cylinder 71 and the piston 72 decreases, allowing the introduced fluid to be discharged from the cylinder 71 through the output one-way valve 712, and then enter the tank body 11 through the tank cover 12. This realizes the transportation of fluid inside the tank, facilitates the removal of residual liquid and exhaust gas from the tank, reduces the residue of harmful substances, thereby reducing the harm to cleaning workers and alleviating their cleaning workload.

[0054] A further improvement is that a filter screen 74 is provided on the top cover of the cylinder 71, and the piston 72 seals through the filter screen 74. By providing the filter screen 74, external dust and impurities can be prevented from entering the cylinder 71, causing wear on the piston 72 and cylinder 71, and affecting the sealing connection between the piston 72 and cylinder 71. In this way, the cleanliness of the inside of the cylinder 71 and the sealing performance between the cylinder 71 and piston 72 are ensured, thereby guaranteeing fluid transport efficiency.

[0055] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A tank truck residual fluid centralized collection system characterized by, The utility model relates to a nitrogen injection system for tank car, which comprises: a pre-embedded pool, which is closed at the top and located below the ground, and is provided with detection devices for detecting liquid level, oxygen content and pressure, the pre-embedded pool is fixedly connected with a gas injection pipe and a water injection pipe for injecting nitrogen and water respectively, the gas injection pipe and the water injection pipe are connected with a gas injection valve and a water injection valve respectively; a composite hose, which has a liquid inlet end for communicating with the bottom of the tank body of the tank car and a liquid outlet end for communicating with the pre-embedded pool, the liquid inlet end is located above the liquid outlet end; a liquid delivery pump and a storage container, the input end of the liquid delivery pump is connected with the pre-embedded pool, and the output end is connected with the storage container, the bottom of the storage container is provided with a liquid discharge pipe, and the liquid discharge pipe is connected with a liquid discharge valve.

2. The tank truck residual collection system of claim 1, wherein: The input end of the liquid delivery pump is connected with a liquid suction pipe, the liquid suction pipe is a telescopic pipe with adjustable axial length, the top end of the telescopic pipe is connected with the liquid delivery pump, and the bottom end is connected with a float.

3. The tank truck residual collection system of claim 2, wherein: The liquid suction pipe is a corrugated hose.

4. The tank truck residual collection system of claim 3, wherein: The float slides in the pre-embedded pool along the vertical direction.

5. The tank truck residual collection system of any one of claims 1-4, wherein: A conveying assembly is arranged between the composite hose and the pre-embedded pool, which is used for conveying the fluid in the tank body of the tank car to the pre-embedded pool, and the fluid in the tank body of the tank car includes residual liquid and tail gas.

6. The tank truck residual collection system of claim 5, wherein: The conveying assembly comprises a cylinder, a piston and a driving unit, the circumferential outer edge of the piston is sealingly connected with the circumferential inner wall of the cylinder, the driving unit drives the piston to reciprocate along the axial direction of the cylinder, and the cylinder and / or the piston is provided with an inlet and an outlet, the inlet and the outlet are respectively connected with an input one-way valve and an output one-way valve.

7. The tank truck residual collection system of claim 6, wherein: The cylinder is vertically arranged along the axial direction and has an open top, the outlet is arranged at the bottom of the cylinder, and the inlet is arranged above the outlet.

8. The tank truck residual collection system of claim 7, wherein: The piston is provided with a liquid inlet channel, the inlet is one end of the liquid inlet channel connected with the composite hose, and the input one-way valve is arranged in the liquid inlet channel.

9. The tank truck residual collection system of claim 6, wherein: A filter screen is arranged on the top of the cylinder, and the piston penetrates through the filter screen.

10. The tank truck residual collection system of claim 6, wherein: The driving unit comprises a driving motor, a driving link and a transmission link, the driving motor is fixedly connected with the pre-embedded pool and is hingedly connected with one end of the driving link through the output end, and the other end of the driving link is hingedly connected with the piston through the transmission link.

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